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Fundamentals of Computer

Fundamentals of Computer

With reference to class 3 Fundamentals of Computer, computer is an advanced electronic device that performs both arithmetic and logical operations.

  • Computers are used in many fields.

 

Parts of a Computer

CPU –

  • With respect to class 3 computer lessons, CPU, which is the brain of the computer, performs all functions.
  • CPU is the central processing unit.
  • It executes the instruction from the user.

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Mouse –

  • With respect to fundamentals of computer class 3, mouse is used to pick items on the screen.
  • When the mouse moves, the mouse pointer also moves.

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Keyboard –

  • With respect to fundamentals of computer class 3, keyboard has the keys that are used to type letters and numbers.
  • This helps to feed the information to CPU.

 

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Monitor –

  • With respect to class 3 computer lessons, monitor displays the words or pictures processed by the computer.
  • It acts as the display screen.

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Speakers –

  • Speakers let you hear the sound from the computer.
  • Each notification will have different tone.

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Uses of Computers With Respect to Class 3 Computer Lessons

 

  • A computer helps you to type a document.
  • A computer helps you to listen to music.
  • A computer helps you to use the internet.
  • A computer helps you to send e-mail.
  • A computer helps you to play games.
  • A computer helps you to draw a picture.
  • A computer helps you to watch a movie.
  • A computer helps you to chat with a friend.

 

Storage Devices With Respect to Fundamentals of Computer Class 3

  • A storage device is used in the computers to store data.
  • It is one of the core functions of the modern computers.

 

Types of Storage

There are four type of storage:

  • Primary Storage
  • Secondary Storage
  • Tertiary Storage
  • Off-line Storage

 

Primary Storage

  • They are also known as the main memory.
  • These are connected to the CPU via a memory bus.
  • Main role of CPU is to read the instructions stored there and executes them as required.

Example: RAM, ROM, Cache

RAM – With respect to fundamentals of computer class 3, any of the data in Random Access Memory can be accessed just as fast as any of the other data.

ROM – Read only memory, which helps the computer to boot up.

Cache – Cache is a high-speed access area that can be either a reserved section of main memory or a storage device.

 

Secondary Storage –

  • CPU cannot access secondary storage directly.
  • Secondary storage uses computer’s input/output channels to access it.
  • Later they transfer the desired data using intermediate area in primary storage.
  • Example: Hard disk

 

Hard Disk – With respect to fundamentals of computer class 3, hard disk helps to store more data and it can be inbuilt in a computer (internal) or can be added separately to a computer (external).

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Tertiary Storage –

  • These storages are usually very slow.
  • So it is usually used to store data that is not accessed frequently.

Examples: Magnetic Tape, Optical Disc

Magnetic Tape –

  • Data are encoded on a magnetically coated strip of plastic.
  • These tapes are similar to tapes used to store music.
  • Tape is much less expensive than other storage mediums.
  • It can hold very little information.

Optical disc –

They store contents in digital format and is read using a laser assembly.

The most common types of optical media are – Blu-ray, Compact Disc (CD) & Digital Versatile Disc (DVD)

 

 

Off-line Storage –

  • Also known as disconnected storage.
  • This storage device is not under the control of a processing unit.
  • It must be inserted or connected by a human operator before a computer can access it again.

Examples: Floppy Disk & Memory card

Floppy Disk –

A portable, soft magnetic disk which are slow to access and has less storage capacity.

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Memory Card –

 They are connected to computers which can store all type of media.

 

Recap

Parts of a Computer

  • CPU
  • Mouse
  • Keyboard
  • Monitor
  • Speakers

 

Uses of Computers

 

With respect to fundamentals of computer class 3, a computer helps you to type a document, listen to music, use the internet, send e-mail, play games, to draw a picture, watch a movie, and chat with a friend.

 

Storage devices

  • A storage device is used in the computers to store data.
  • It is one of the core functions of the modern computers.

 

Types of Storage –

 

With respect to class 3 computer lessons, there are four types of storage:

 

  • Primary Storage
  • Secondary Storage
  • Tertiary Storage
  • Off-line Storage

 

 

 

Quiz for Fundamentals of Computer

Q.1

What is a cursor?

a) Ink in printer
b) Pointer on screen
c) Noise from speaker
d) None of the above

Q.2

What is the use of joystick?

a) To print pages
b) To enter data
c) To play games
d) To listen to music

Q.3

Which of them is an output device?

a) Speaker
b) CPU
c) Microphone
d) Mouse

Q.4

Joystick is an ____________ Device

a) Input
b) Storage
c) Output
d) Processing

Q.5

Light Pen is an _____________ device.

a) Storage
b) Processing
c) Output
d) Input

Q.6

Identify the object in the image

a) Monitor
b) Inkjet printer
c) Keyboard
d) Joystick

Q.7

Keyboard is used to ______________.

a) Print small pages
b) Enter data
c) See characters
d) produce output

Q.8

Plotter is an ____________ Device

a) Output
b) Input
c) Processing
d) Storage

Q.9

Identify the object in the image?

a) Digital Pen
b) Web cam
c) Pointer
d) Plotter

Q.10

What is the function of light pen?

a) Listening Device
b) Printing device
c) Speaking device
d) Pointing device

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